/**
 * 前后端交互的核心文件，只是将axios进行了封装，并没有具体的业务逻辑
 */
import axios from 'axios'
// 解构的导入方法
import { MessageBox, Message } from 'element-ui'
// 导入整个store文件夹
import store from '@/store'
// 只拿getToken这一个方法，解构
import { getToken } from '@/utils/auth'

// create an axios instance named service
const service = axios.create({
  baseURL: process.env.VUE_APP_BASE_API, // url = base url + request url,引用配置文件的路径
  // withCredentials: true, // send cookies when cross-domain requests
  timeout: 5000 // request timeout
})

// request interceptor
service.interceptors.request.use(
  config => {
    // do something before request is sent
    // 只是一个示例模板，可以按需求修改cookie的key
    if (store.getters.token) {
      // let each request carry token
      // ['X-Token'] is a custom headers key
      // please modify it according to the actual situation
      // 这是一个自定义的请求头，需要在后端定义允许这个 Access-Control-Allow-Headers：X-Token
      config.headers['X-Token'] = getToken()
    }
    return config
  },
  error => {
    // do something with request error
    console.log(error) // for debug
    return Promise.reject(error)
  }
)

// response interceptor
service.interceptors.response.use(
  /**
   * If you want to get http information such as headers or status
   * Please return  response => response
  */

  /**
   * Determine the request status by custom code
   * Here is just an example
   * You can also judge the status by HTTP Status Code
   */
  response => {
    const res = response.data

    // if the custom code is not 20000, it is judged as an error.
    // (res.code !== 20000){
    if (res.code !== 20000 && res.code !== 200 ) {
      Message({
        message: res.message || 'Error',
        type: 'error',
        duration: 5 * 1000
      })
      // 自定义三处状态码
      // 50008: Illegal token; 50012: Other clients logged in; 50014: Token expired;
      if (res.code === 50008 || res.code === 50012 || res.code === 50014) {
        // to re-login
        MessageBox.confirm('You have been logged out, you can cancel to stay on this page, or log in again', 'Confirm logout', {
          confirmButtonText: 'Re-Login',
          cancelButtonText: 'Cancel',
          type: 'warning'
        }).then(() => {
          store.dispatch('user/resetToken').then(() => {
            location.reload()
          })
        })
      }
      return Promise.reject(new Error(res.message || 'Error'))
    } else {
      // 都正常就返回响应res
      return res
    }
  },
  error => {
    console.log('err' + error) // for debug
    Message({
      message: error.message,
      type: 'error',
      duration: 5 * 1000
    })
    return Promise.reject(error)
  }
)
//其他服务里直接使用service
export default service
